Hibernate Error with folders

I have the following problem.
I have create a small project with Netbeans and i am using Hibernate for a simple CRUD with Derby DB .
Everything works fine when my classes are in the default folder BUT when i create separate folders for classes and not using the default folder nothing works and get the message that hibernate cannot find the classes.
What can i do to solve that .My imports are ok but nothing seems to work no compile errors.

Horche Gratsias wrote:...Everything works fine when my classes are in the default folder BUT when i create separate folders for classes and not using the default folder nothing works and get the message that hibernate cannot find the classes.
...

You should point the Java to find the classes it needs (i.e.: add the location of the classes to the classpath). How you run it BTW?

Horche Gratsias wrote:...Everything works fine when my classes are in the default folder BUT when i create separate folders for classes and not using the default folder nothing works and get the message that hibernate cannot find the classes.
...

You should point the Java to find the classes it needs (i.e.: add the location of the classes to the classpath). How you run it BTW?

if i point Java to find the classes it needs i also get errors.What do you mean with add the location of the classes to the classpath ?What do you mean how do i run it BTW?